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Company profile

JST has passed ISO9001 quality management system certification, API Q1 system certification and HSE system certification. JST is dedicated to innovation, and has developed over 40 patented products and counting.

All products

Lockdown screw packing for casing head

Lockdown screw seal is sed mainly in geothermal applications, HNBR packing with stainless steel caps provide superior performance over metal pressure seals.

S seal for casing head and tubing hanger

S seal is a technologically advanced replacement for traditional three-piece T-Seals or O-Rings with back-ups.

P seal for casing and tubing

P seal is constructed from an elastomer with back up rings for anti-extrusion. Energized by the injection of sealant, it is a static seal that is used to seal rough casing and tubing. Backup rings are available in Mesh Stainless Steel or Solid Carbon Steel.

Casing head and tubing hanger FS seal

The FS-seal is a relatively large cross section spring energized elastomer casing and tubing hanger seal for wellheads that always has the springs on the internal surface.

API6A casing head T-seals

T-seals are three piece seals with an elastomeric lip and hard plastic anti-extrusion rings, it is proved to be of long time service. The standard design will fit into an o-ring gland and can be machined or net moulded.

T-Seals for casing head

T-seals are three piece seals with an elastomeric lip and hard plastic anti-extrusion rings, it is proved to be of long time service. The standard design will fit into an o-ring gland and can be machined or net moulded.

Casing secondary BT seal

BT Seal is a static seal that is used to seal rough casing and tubing. It is constructed from an elastomer with anti-extrusion spring bonded within it. Springs are available in stainless steel, elastomer could be HNBR or NBR.

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